Renesas 71V3577S80PFG8

Overview

71V3577S80PFG8 from Renesas Electronics is a 128K × 36-bit (4.608 Mb), 3.3V synchronous SRAM with flow-through output architecture, 8.0 ns access time at 100 MHz, TQFP-100 package, and industrial temperature range (–40°C to +85°C). It supports linear/interleaved burst modes via LBO pin and features single-cycle deselect, self-timed write, and ZZ-controlled sleep mode - deployed in high-speed cache buffers and network packet memory subsystems.

For engineers reviewing the 71V3577S80PFG8 datasheet, 71V3577S80PFG8 pinout, 71V3577S80PFG8 application, or 71V3577S80PFG8 equivalent, key selection criteria include burst-mode timing compliance, 3.3V I/O voltage tolerance, flow-through vs. pipelined output latency, TQFP-100 thermal/power constraints, and industrial-grade data retention under ZZ sleep mode.

Technical Context

This SRAM implements a synchronous interface with registered address, control, and data inputs, and a flow-through (unregistered) output path - eliminating output pipeline delay for zero-cycle read-to-data alignment. Its internal burst counter advances on ADV=LOW and selects sequence order (linear or interleaved) via static LBO configuration.

Write operations support global (GW) or byte-selective (BW1–BW4 + BWE) control, with asynchronous OE and ZZ enabling independent output gating and full-chip power-down. All synchronous inputs (CE, CS0, CS1, ADSP, ADSC, ADV, GW, BWE, BWx) are clocked on CLK rising edge with defined setup/hold times per speed grade.

Key Specifications

Pinout & Package

71V3577S80PFG8 is packaged in a JEDEC-standard 100-pin plastic thin quad flatpack (TQFP), 14 mm × 20 mm body, 0.5 mm pitch, exposed pad not present. Pinout conforms to PKG100 footprint for 128K × 36 configuration (per Renesas doc 6450 drw 02a).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous SRAM applications.

Compared with 71V3577S100PFG, the 71V3577S80PFG8 trades 20 MHz bandwidth for industrial temperature qualification and tighter 8.0 ns access; versus CY7C1362AV33-100AXC, it delivers true zero-cycle read-to-output - a decisive advantage in latency-constrained networking silicon.

Availability

71V3577S80PFG8 is available at Aetrix Electronics and suitable for network packet buffering, industrial PLC data logging, telecom line card memory, and high-speed cache controller applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 71V3577S80PFG8 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The 71V3577S family targets high-performance, low-latency memory subsystems in networking, telecom, and real-time control - emphasizing deterministic timing, industrial reliability, and burst-mode efficiency over density or cost-per-bit.

FAQ

What is the maximum operating frequency of the 71V3577S80PFG8?

The 71V3577S80PFG8 supports up to 100 MHz clock frequency with 8.0 ns access time, validated across the full industrial temperature range (–40°C to +85°C). This speed grade is distinct from the 6.5 ns commercial-only variant and ensures timing compliance in thermally demanding deployments like base station radios and rail signaling hardware.

Does the 71V3577S80PFG8 support both linear and interleaved burst modes?

Yes, the 71V3577S80PFG8 supports both burst modes via the LBO (Linear Burst Order) pin: LBO = LOW selects linear sequence (00→01→10→11), while LBO = HIGH selects interleaved (00→01→11→10). This hardware-configurable feature enables direct alignment with processor cache-line fetch behavior without firmware intervention.

What is the function of the ZZ pin on the 71V3577S80PFG8?

The ZZ pin on the 71V3577S80PFG8 is an asynchronous high-active sleep mode input. When asserted (ZZ = HIGH), it gates the internal clock and reduces supply current to ≤35 µA while guaranteeing data retention across –40°C to +85°C - making the 71V3577S80PFG8 suitable for battery-backed or energy-harvesting industrial controllers.

How does the flow-through output architecture of the 71V3577S80PFG8 differ from pipelined SRAMs?

Unlike pipelined SRAMs that insert a register in the output path (adding 1-clock latency), the 71V3577S80PFG8 uses a flow-through architecture: data appears at I/O pins within tCD = 8.0 ns of CLK rise, with no intermediate register. This eliminates read-to-output delay - a critical advantage in packet forwarding, real-time control, and burst-read timing-critical systems.

Is the 71V3577S80PFG8 pin-compatible with other devices in the 71V3577/79 family?

Yes, the 71V3577S80PFG8 shares identical TQFP-100 pinout and signal mapping with other speed grades (e.g., 71V3577S100PFG) and the 71V3579S variants. However, note that BW3/BW4 are NC on 256K×18 configurations - always verify memory organization and pin usage against the specific device's configuration diagram (e.g., 6450 drw 02a for 128K×36).